Pyramid of Kukulkan shows final light flashes on 29 October
Published on 10/04/2026 at 02:09 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Pyramid of Kukulkan (El Castillo) at Chichen Itza is expected to show the final brief light flashes of its annual pattern on 29 October 2026. The Mexican National Institute of Anthropology and History, INAH, describes the phenomenon as the descent of Kukulkan, created when sunlight forms triangular patches on the pyramid's northwest balustrade.
Why Pyramid of Kukulkan reaches its final light stage on 29 October
The effect is not a scheduled projection or a night-time performance. As the sun moves towards the western horizon, its light reaches the northwest ramp at changing angles, producing triangles that appear to form the body of a serpent and lead towards the carved stone head at the foot of the staircase.
INAH's 2026 account says the number and shape of the triangles change throughout the year. The sequence reached five triangles on 9 October, after which the shapes began disappearing before sunset. The last brief glimmers are expected around 29 October, after which the ramp remains in shadow until the next cycle begins on 12 February 2027. The INAH account of the light cycle links the changing display to recent archaeoastronomical observations.
The annual light pattern follows the pyramid's architecture
The pyramid is 30 metres high, has nine stepped bodies and measures 55.5 metres on each side. Four staircases end in balustrades, including the northwest ramp where the solar pattern appears. The building also has a temple at its summit, although the light effect is read along the lower architectural line.
The pattern was once promoted mainly around the spring and autumn equinoxes. The newer observations presented by INAH describe a longer annual sequence, with illumination beginning on 12 February, reaching seven triangles from 15 to 25 March, and changing again after the autumn equinox. That connection gives the late-October flashes a specific place in the calendar of the Maya monument rather than limiting the phenomenon to two equinox dates.
The archaeological zone forms part of the historic city of Chichen Itza, whose development included Maya and central Mexican influences. INAH places the site's main chronological range between 525 and 1200 AD and identifies Chichen Itza as a major centre in the Yucatan Peninsula. Its official site information identifies the archaeological zone and its visitor access arrangements.
Visiting Pyramid of Kukulkan: what travellers from Western Europe should know
- The final brief light flashes are expected around 29 October 2026 on the northwest balustrade at the archaeological zone of Chichen Itza.
- The phenomenon depends on sunlight and is not a ticketed projection show, so the visible pattern is not guaranteed on a particular afternoon.
- Chichen Itza is in Yucatan, Mexico. INAH places it 115 kilometres from Merida, beside road 180 towards Piste; the site is 2 kilometres from Piste and can be reached by public transport.
- The pyramid has four staircases and nine stepped bodies. The light pattern is viewed from the ground around the structure, not as a climb to the summit.
- Spanish is the official language of Mexico and the national currency is the Mexican peso.
- Entry requirements depend on your nationality; UK travellers can check the FCDO travel advice at gov.uk/foreign-travel-advice, Irish travellers the Department of Foreign Affairs at ireland.ie.
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Frequently asked questions about Pyramid of Kukulkan
When will the final light flashes appear at Pyramid of Kukulkan?
INAH says the last brief glimmers on the northwest balustrade should be visible around 29 October 2026. The pattern then remains in shadow until the next cycle begins on 12 February 2027.
What is the descent of Kukulkan at Pyramid of Kukulkan?
It is a sunlight and shadow phenomenon in which triangular patches appear on the northwest ramp and create the impression of a serpent moving towards the carved stone head below.
Where is Pyramid of Kukulkan and how do you get there?
The pyramid stands in the archaeological zone of Chichen Itza in Yucatan, Mexico. INAH says the site is 2 kilometres from Piste and can be reached by public transport via road 180.
